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Add more depth to the upstart example in host_integration.rst

I found that the original example wasn't starting the docker container when docker is started.  So, I modified it using information I found from https://groups.google.com/forum/#!msg/docker-user/OWz8EOpiXuo/L_uxGFQuYlkJ

Also, upstart wasn't starting docker if it wasn't running ahead of time.  So, I added a change to the docker upstart script to solve this.
This commit is contained in:
Ryan Seto 2013-11-13 13:34:34 -05:00
parent c964494d31
commit 02884ee429

View file

@ -29,6 +29,10 @@ Here are a few sample scripts for systemd and upstart to integrate with docker.
Sample Upstart Script
---------------------
In this example we've already created a container to run Redis with an id of
0a7e070b698b. To create an upstart script for our container, we create a file
named ``/etc/init/redis.conf`` and place the following into it:
.. code-block:: bash
description "Redis container"
@ -36,7 +40,32 @@ Sample Upstart Script
start on filesystem and started lxc-net and started docker
stop on runlevel [!2345]
respawn
exec docker start -a 0a7e070b698b
script
# Wait for docker to finish starting up first.
FILE=/var/run/docker.sock
while [ ! -e $FILE ] ; do
inotifywait -t 2 -e create $(dirname $FILE)
done
/usr/bin/docker start -a 0a7e070b698b
end script
Next, we have to edit the docker upstart script (``/etc/init/docker.conf``)
so that we run docker with ``-r=false``. In this example, we also ensure
that docker will start running before *redis* is started.
.. code-block:: bash
description "Docker daemon"
start on filesystem and started lxc-net
start on (starting redis)
stop on runlevel [!2345]
respawn
script
/usr/bin/docker -d -r=false
end script
Sample systemd Script